Packing container



March 1930. G. STABERNACK: ET AL 1,750,545

ucxme con'ru nnn Filed June 28. 1928 %v: f E e f /7 i (my [0rd,

if 11 2M Patented Mar. 11, 1930 enone STABERNACK AND RICHARD. STABERNACK, or OFFENBACH-ON-THE-MAIN, GERMANY PACKING CONTAINER Application filed June The packing containers for liquid or powdery chemical products designed to be sent to tropical countries, ife. exposed for longer time to heat and to the action of sea water, have hitherto been made from sheet metal, although containers of this material do not thoroughly fulfill the requirements. Such containers must not only be perfectly watertight and airtight but also capable to withstand the corroding action of liquid or powdery chemicals which have become moist. The sheet metal boxes or containers have bottom plates soldered in the body and this soldering point is specially liable to suffer from the action of the corroding contents.

It has been proposed to use, as material for such containers, a specially prepared cardboard which withstands the action of chemicals, specially if the outer surface of the container is coated with varnish or the like. The difiiculty connected with such cardboard containers consists in the obtention of a watertight and airtight closing, as it is impossible to provide in the cardboard a lasting thread, so that tightly closing screw stoppers cannot be used.

At this point intervenes the invention. The invention starts also from the use of cardboard for the body of the container and for the lid, but provides a metal armature for the lid which forms a charging opening with threaded neck, so that the container can be closed by a screw lid of metal.

Vith this object in view, a ring of sheet metal is arranged in the ring-shaped cardboard lid, this sheet metal ring having an upwardly bent outer edge, the cardboard lid having a double flange with which the upwardly bent edge of the sheet metal ring en- I gages. For re-in-iorcing the lid has further a ring-shaped lower layer of cardboard the upwardly bent edge of which is rabbeted'together with the flange of the sheet metal ring. Into the threaded neck formed by the inner edge of the sheet metal ring a cup is placed, with interposition of a rubber packing, so that the flange of said cup bears on the end face of the threaded neck, whereupon a screw cap is forced over the threaded neck.

An embodiment of the invention is illus- 28, 1928, Serial No. 288,884, and in Germany July 8, 1927.

trated by way of example, ing drawing, in which:

Fig. 1 shows the container in radial section.

Fig. 2 is a top plan view of Fig. 1.

Fig. 3 is a part section through the closure of the packingcontainer on larger scale.

The body a of the container is enclosed by a casing Z) the lower edge 0 of which is folded inward and upward so that the downwardly directed flange it of the bottom plate It engages between the two arms of this folded edge c. These elements are made of cardboardand they have on the inner surface a coating m of a suitable varnish. The upper edge of the casing 6 does not extend to the top edge of the body a and forms a shoulder for the edge of the lid of cardboard.

The packing container as just described is known per se. i The novelty consists in the construction of the lid. This lid of card board has a double edge (Z, d the outer longer arm d of which bears on the upper edge of the casing 6. Between the two arms (I, (l of the edge of the lid the upwardly bent outer edge e of a ring-shaped plate 6 of sheet metal engages the inner upwardly turned edge f of which forms a threaded neck serving as charging hole for the container. Under the sheet metal plate 6 a ring 9 of cardboard is arranged which has an outer upwardly turned so edge 9 which, together with the edge e of the sheet metal ring e, is clamped between the two arms 0?, d of the cardboard lid. To further unite the sheet metal ring 0 with the lower re-inforcing ring 9 of cardboard. pointed flaps 7c are stamped out of the sheet metal ring 6 and bent downwardly and pressed into the cardboard ring g. The inner upper edge f of the threaded neck 7 is bent inward and then downward again, and a cup '1 having a horizontal flange r is pressed, with interposition of a rubber ring n or of any other suitable packing, into said flange 1". The threaded neck f and the cup 1' are closed by a screw cap 8 screwed onto the outer surface of the threaded neck f and having handles p. The re-int'orcing ring 9 of cardboard has also a coating of varnish m on the lower. surface.

in the accompanyscrew neck, the upper edge of said inner bent flange being bent horizontally and then downwardly, and a'screw cap threaded on said screw neck,

2. A water and air ti ht packing container formed of card board For carrying liquid or powdery chemical substances comprising, in combination, a card board lid, ametal ring having a threaded neck thereon, a closure adapted to be threaded on said neck, and a ring shaped insert of card board for supporting said ring, the said insert having an upwardly turned outer flange engaging between said ring and said lid.

3. A water and air tight acking container of card board for liquid an owder' chemical substances, com rising the com ination of a card board 1i having a downwardly and inwardly folded edge thereon, a metal ring having a threaded neck thereon, as well as an upwardly bent annular flange on the outer periphery thereof, a closure threaded on said neck, a ring sha ed insert of cardboard supporting said rm the said insert having an upwardly turne outer flange engaging between said ring and said lid, the said flange being held, together with said upwardly ent inner flange of said rin by mgans of the downwardly folded edge of said li 4. A water and air tight packing container of card board for liquid or powdery chemical substances comprising the combination of a card board lid having a downwardly folded tures.

GEORG STABERNACK. RICHARD STABERNACK.

edge thereon, a sheet metal ring having a threaded neck thereon, as well as an upwardly bent annular flan e on the outer periphery thereof, a closure t readed on said neck, a ring shaped insert of card board supporting said sheet metal ring and having an upwardly turned outer flange engaging between said ring and said lid, the sa1d flange of said insert bein held, together with the flange of thering, y means of the downwardly folded edge of the lid,, and flaps stamped out of'the lateral portion of said sheet metal rin and engaging with the flange of said card board insert.

5. A packing container comprising, in combination, a card board lid the inner edge of which is folded inwardly. and downward y upon itself, a sheet metal ring having) an upwardly bent outer flange engaging etween the folded inner edge of said lid, and an inner upwardly bent flange 0n sa1d ring, which flange is threaded to form a screw neck, the

upper'edge of sa1d inner bent flange being 

